The core idea in algebra is using letters to represent relationships between numbers without specifying what those numbers are! Let's explore the basics of communicating in algebraic expressions.

Let's take a look at a trickier example Write an expression for " m decreased by 7 ". Notice that the phrase "decreased by" tells us to use subtraction. So the expression is m 7 .

Solving equations Learn Worked example: two-step equations Equations with parentheses

To write simple algebraic expressions from mathematical statements, you can follow this procedure: 1. Identify the key terms in the written statement (e.g. "sum," "product," "quantity").

This topic covers: - Simplifying rational expressions - Multiplying, dividing, adding, & subtracting rational expressions - Rational equations - Graphing rational functions (including horizontal & vertical …

Finding the value of an expression Learn Evaluating expressions with variables: temperature Example: Evaluating expressions with 2 variables

By replacing variables with their corresponding values, we can easily compute the result of expressions, even for more complex examples with multiple terms and operations.

What you will learn in this lesson In this lesson, you will practice simplifying more complicated rational expressions. Let's look at two examples, and then you can try some problems!

Practice Multiply & divide rational expressions (advanced) Get 3 of 4 questions to level up!

A rational expression is a ratio of two polynomials. The domain of a rational expression includes all real numbers except those that make its denominator equal to zero.